.gradient(@from-color:red,@to-color:yellow){
    background: -webkit-linear-gradient(left,@from-color,@to-color);
    background: -o-linear-gradient(right,@from-color,@to-color);
    background: -moz-linear-gradient(right,@from-color,@to-color);
    background: linear-gradient(to right,@from-color,@to-color);
}
.gradientUp(@from-color:red,@to-color:yellow){
    background: -webkit-linear-gradient(top,@from-color,@to-color);
    background: -o-linear-gradient(top,@from-color,@to-color);
    background: -moz-linear-gradient(top,@from-color,@to-color);
    background: linear-gradient(to bottom,@from-color,@to-color);
}
.gradientLeftTop(@from-color:red,@to-color:yellow){
    background: -moz-linear-gradient(left top, @from-color, @to-color);
    background: -webkit-linear-gradient(left top, @from-color, @to-color);
    background: -o-linear-gradient(left top, @from-color, @to-color);
    background: linear-gradient(left top,@from-color,@to-color);
}